All the example animations that I have seen using the CompositionTarget.Rendering approach have a decelerating effect. They use a difference in the previous value and the new value and multiply it by the change in time (delta-time). As you approach closer to the end-value, the difference becomes smaller and so does the quantity (difference * deltaTime), which causes a decelerating effect.

I am using the CompositionTarget approach to do a Layout animation. For that I want to implement a constant speed animation, like you have with DoubleAnimation. The only problem is I haven't been able to figure out when to set the From/To values inside my Layout pass.
Any suggestions for implementing the constant speed animation?